JT808

JT808 is a protocol toolkit for vehicle positioning and telematics systems. It turns binary terminal messages into explicit domain events and keeps the transport, codec, session, and business layers separate.

Focus

• decode and encode protocol messages with predictable validation;
• manage terminal sessions and acknowledgements;
• expose normalized vehicle events to downstream services;
• make malformed frames and unsupported message types observable.

The project treats the protocol boundary as a reliability boundary: raw bytes are validated once, then passed to the rest of the system as typed events.